I've managed to accommodate the need for multiple pages open at once by having multiple windows with multiple tabs. This works much better for me than paper bo

I've managed to accommodate the need for multiple pages open at once by having multiple windows with multiple tabs. This works much better for me than paper books due to freeing up desk space and not requiring multiple purchases of a paper text. I use OS X though, so I have a convenient graphical window switching tool which shows me all the windows of a particular app, rather than a list of window names. Perhaps the experience is different for Windows and Linux users? On the iPad, I make extensive use of notes, bookmarks and different coloured highlights. In some cases I'll use e.g.: yellow for definitions, blue for examples, pink for caveats. In other cases I'll use yellow for topic A, pink for topic B, etc. Thus the always-visible index of notes gives me twice as much information! You can't easily get the same utility out of a paper book.